In 4 of 5 suburbs, a household saving $2,000/month can never catch a 20% deposit on the median house: the price rises faster than the savings accumulate. But the median unit stays within reach in every one of them (under 5 to about 8 years), because unit growth has been far milder. One suburb, Parramatta, is different: both houses and units are correcting, so its deposit target has stopped rising rather than fallen further out of reach. We hold a declining target steady instead of projecting the drop forward, so the honest read in these suburbs is simple: the unit is reachable, the house mostly is not. The maths is below.
Units: within reach
Units are where first home buyers actually buy in these suburbs, and unit growth has been far milder than house growth. At a $2,000/month savings rate, a 20% unit deposit is reachable in roughly four-and-a-half to eight years across all five. In Parramatta the unit market is softening rather than rising, so the target is at least not getting further away.
| Suburb | Median | Sales | 12-mo growth | 20% deposit | Years to save* |
|---|---|---|---|---|---|
| Blacktown | $530,000 | 891 | +1.0% | $106,000 | 4.6 yrs |
| Liverpool | $515,500 | 1,626 | +3.1% | $103,100 | 5.0 yrs |
| Penrith | $600,000 | 1,042 | +6.2% | $120,000 | 8.2 yrs |
| Campbelltown | $565,000 | 430 | +6.6% | $113,000 | 7.7 yrs |
| Parramatta | $615,000 | 1,845 | -7.5% | $123,000 | 5.1 yrs |
Houses: the treadmill
Houses tell the opposite story. With 12-month house growth of about +6% to +14% across four of the five suburbs, the 20% deposit target rises faster than a $2,000/month saver can close it, so the model returns “Never”. The exception is Parramatta, where house prices are down about 10% over the year. Because we do not project price falls forward, its target is held steady rather than rising, so unlike the growth suburbs the deposit is at least not running away (13.9 years at $2,000/month).
| Suburb | Median | Sales | 12-mo growth | 20% deposit | Years to save* |
|---|---|---|---|---|---|
| Blacktown | $1,128,000 | 1,008 | +6.4% | $225,600 | Never* |
| Campbelltown | $980,000 | 413 | +7.7% | $196,000 | Never* |
| Liverpool | $1,230,000 | 233 | +11.8% | $246,000 | Never* |
| Penrith | $1,080,000 | 277 | +14.2% | $216,000 | Never* |
| Parramatta | $1,672,000 | 111 | -10.1% | $334,400 | 13.9 yrs |
*Years to save a 20% deposit at $2,000/month with no investment return assumed, where the deposit target grows at the suburb's 12-month price-growth rate when that rate is positive; for flat or falling suburbs we hold the target steady rather than project the decline forward. “Never” means the target recedes faster than savings accumulate within an 80-year horizon. This is a model output under a stated assumption, not a forecast or financial advice. See limitations below.
Methodology
Every figure here is computed directly from the NSW Valuer-General Property Sales Information, the NSW Government's register of property sales, not an aggregator estimate. We start from the full dataset (roughly 2.2 million records over six years), take residence sales in the 12 months to February 2026, apply a $50,000 floor to drop nominal transfers, classify each sale by title type (strata-titled, which covers apartments, townhouses and villas, is treated as “unit”), and compute the median, the sale count, and the 12-month growth (current vs prior 12-month median) per suburb. The pipeline is open and reproducible (scripts/vg-suburb-medians.mjs). These government medians sit within about 2 to 3% of the CoreLogic, PropTrack and Domain consensus shown on our suburb affordability pages; we use the government figures here so every number is first-party and verifiable.
A note on data quality. We cross-checked the government medians against CoreLogic, PropTrack and Domain before publishing. They agreed closely on the median levels; where a provider returned a value that was unavailable, implausible, or reported missing data as zero, we set it aside and relied on the government records as the source of truth.
The treadmill model. The 20% deposit target is not static; it grows at the suburb's price-growth rate. We find the first point where cumulative savings ($2,000/month, no investment return) meet that rising target. Where the target grows faster than savings accumulate, there is no such point and the deposit is a receding target. For suburbs that are flat or correcting we hold the target steady rather than projecting the fall forward, since a sustained decline is not a realistic saving assumption. This corrects the common “X years to save” figure, which assumes a fixed target and materially overstates affordability in high-growth suburbs.
What the growth figure is, and is not. The 12-month growth is the change in the median sale price between the two windows. Like any median of actual sales it moves with the mix of what sold, not only with price, so it can differ from a constant-quality index or a portal estimate. Parramatta units are the clearest case: heavy new-apartment turnover pulls the median around, so the -7.5% reflects a cheaper spread of recorded sales as much as any price fall. The figures are a snapshot as at publication; because the NSW dataset keeps registering late sales into the window, re-running the pipeline can move a number by a few tenths of a percent.
What this does not prove
- It is not financial advice, and the “years” figure is a model output, not a forecast.
- The $2,000/month savings rate is a single illustrative assumption. Higher savings (or investment returns on the growing balance, which we conservatively ignore) shorten the timeline; lower savings lengthen it.
- 12-month growth rates are volatile and not a prediction of future growth: recent double-digit rates are unlikely to persist indefinitely, and the Parramatta correction may not. The model shows what happens if a given rate continues, not that it will.
- It ignores income growth, government schemes (the 5% Deposit Scheme and First Home Super Saver Scheme change the deposit needed), and individual circumstances. Use our deposit tracker for your own numbers.
Cite this
NestPath (2026). The Deposit Treadmill: How Long to Save a Home Deposit Across Sydney's First-Home-Buyer Suburbs. Retrieved from https://nestpath.com.au/research/au-deposit-treadmill-2026. Licensed CC BY 4.0, free to reuse with attribution.
Related
- FHB affordability by suburb: median, stamp duty and deposit per suburb.
- Deposit tracker: model your own savings timeline.
- How to save for a house deposit.